A Simple Method for Monitoring Eight N-Nitrosamines in Beef Jerkys by Gas Chromatography–Tandem Mass Spectrometry with One-Step Treatment Coupled to Active Carbon Solid-Phase Extraction

Wang, Zongyi; Zhai, Mengting; Xia, Xiaonan; Yang, Man; Han, Tao; Manqing, Huang

doi:10.1007/s12161-017-1067-z

Cited by 8 publications

(1 citation statement)

References 24 publications

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“…The analysis of NDMA in water matrices at trace levels is known to be challenging due to NDMA's high solubility and polarity and its low recovery due to matrix effect [6]. A sample preparation step in the form of extraction and preconcentration is necessary to eliminate the matrix effects and improve its detection limit on analytical instruments such as LC-MS/MS and GC-MS [7,8]. This sample extraction technique is widely applied to improve analyte detection, which occurs at low concentration in various types of samples [9,10].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of coconut shell activated carbon for efficient solid‐phase extraction of N‐nitrosodimethylamine from water

Astuti

Jasemizad

Padhye

2020

J of Separation Science

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A practical and cheap methodology in modifying commercial coconut shell activated carbon for solid‐phase extraction of N‐nitrosodimethylamine in water was developed through an understanding of activated carbon surface chemistry. In comparison with commercial activated carbon, extraction recoveries by activated carbon treated with sulfuric acid decreased by 50%, while those of activated carbon heated at 800°C improved by more than 100%. Acid treatment increased the oxygen content on the carbon's surface. In contrast, heat treatment decreased the surface oxygen content, resulting in a more hydrophobic surface, which favoured adsorption and extraction of N‐nitrosodimethylamine. The influence of different activated carbon sizes, amount of modified activated carbon, and pH on the N‐nitrosodimethylamine recoveries was assessed and compared with the commercial solid‐phase extraction cartridge. The recommended amount of powder activated carbon treated at 800°C was 3 g to yield an optimum recovery of 130%, which was superior to the commercial solid‐phase extraction cartridges. The method validation results confirmed the high accuracy, reproducibility, and precision of the method. The study indicated that chemisorption plays a significant role in the adsorption of N‐nitrosodimethylamine on activated carbon, and the optimization of its surface chemistry can enhance N‐nitrosodimethylamine adsorption/extraction from water.

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